A woman in New York City claims her Wi-Fi signal is making her sick.
"Brain fog, that’s my worst problem, a brain fog," Suzanne Hoyt told CBS New York (video).
"Headaches, perspiration, pain in my jaws and my heart. It’s like a physical expansion of the heart,” Hoyt added.
Hoyt claims the symptoms began after she installed Wi-Fi in her apartment.
This type of condition has been called, "Wi-Fi sensitivity," and Hoyt is not the only one to complain about it.
Dr. David Carpenter, an environmental scientist, claims Wi-Fi sensitivity affects about 5 percent of people, but many of that small percentage may not even know it.
"It’s strong evidence that this is a real syndrome that causes real harm to real people,” Carpenter said.
“They walk around feeling ill and they don’t know what to do about it,” Carpenter added.
Dr. William Barr, a neuropsychologist, calls it a "psychological phenomenon."
"That they establish a belief that something has the potential to cause a symptom, and then when they come in contact with that cause they develop those symptoms,” Barr stated.
Daily Mail reported last year that people who claim to suffer from electrosensitivity have moved to Green Bank, West Virginia, part of the National Radio Quiet Zone, where Wi-Fi, cellphones, TV and radio are banned in the tiny town of 147.
Dr James Rubin, of London's King's College Institute of Psychiatry, weighed in on electrosensitivity in 2013 when he told The Guardian:
"With most conditions, patients don't necessarily know what's going on. But with electrosensitivity there's an absolute certainty about the cause. Self-diagnosis is at the core of it.
"The problem is, if you look for a coherent set of symptoms, you are not going to find it. You even find that people's symptoms change over time. Many have other intolerances in addition to the electrical sensitivity."